:root {
    --blue: #04449E;
    --teal: #2BF6D1;
    --dark: #0f172a;
    --card: #1e293b;
    --text: #f8fafc;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }

body { background: var(--dark); color: var(--text); padding-bottom: 50px; }

.container { max-width: 800px; margin: 0 auto; padding: 0 20px; }

nav { padding: 30px 0; text-align: center; border-bottom: 1px solid rgba(255,255,255,0.05); margin-bottom: 40px; }

.hero { text-align: center; margin-bottom: 40px; }
.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 10px; letter-spacing: -1px; }
.hero h1 span { color: var(--teal); }
.hero p { color: #94a3b8; font-size: 1.1rem; }

.card-shortener {
    background: var(--card);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid rgba(255,255,255,0.05);
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.form-group { margin-bottom: 25px; }

label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.85rem; color: var(--teal); text-transform: uppercase; letter-spacing: 1px; }

.optional { color: #64748b; text-transform: none; font-weight: 400; }

.input-wrapper, .subdomain-box, .path-box {
    background: #0f172a;
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    padding: 0 15px;
    transition: 0.3s;
}

.input-wrapper:focus-within, .subdomain-box:focus-within, .path-box:focus-within {
    border-color: var(--blue);
}

input {
    background: transparent;
    border: none;
    padding: 16px;
    color: white;
    font-size: 1rem;
    width: 100%;
    outline: none;
}

.input-wrapper i { color: #475569; }
.host-display, .prefix { font-weight: 700; color: var(--blue); white-space: nowrap; }

.refresh-btn {
    background: none;
    border: none;
    color: var(--teal);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 10px;
    transition: 0.3s;
}

.refresh-btn:hover { transform: rotate(180deg); }

.btn-primary {
    width: 100%;
    padding: 20px;
    background: var(--teal);
    color: var(--blue);
    border: none;
    border-radius: 12px;
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    transition: 0.3s;
}

.btn-primary:hover { background: #1de0bd; transform: translateY(-2px); }

.result-area { margin-top: 30px; animation: slideUp 0.5s ease; }
.hidden { display: none; }

.result-card { background: rgba(4, 68, 158, 0.1); border: 2px dashed var(--blue); padding: 30px; border-radius: 20px; text-align: center; }

.result-display { display: flex; gap: 10px; margin-top: 15px; }

#shortUrl { background: #0f172a; border: 1px solid var(--blue); color: var(--teal); font-weight: 700; border-radius: 8px; }

#btnCopy { background: var(--teal); color: var(--blue); border: none; padding: 0 25px; border-radius: 8px; font-weight: 800; cursor: pointer; }

@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }